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Thermal and Spectroscopic Studies on the Decomposition of Some Aminoguanidine Nitrates

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Abstract

Diaminoguanidine nitrate (DAGN) and triaminoguanidine nitrate (TAGN),potential energetic materials in emerging propulsion technology with high mass impetus at low isochoric flame temperature have been studied as regards kinetics and mechanism of thermal decomposition using thermogravimetry (TG), differential thermal analysis (DTA),infrared spectroscopy (IR) and hot stage microscopy. Kinetics of thermolysis has been followed by isothermal TG and IR. For the initial stage of thermolysis of DAGN the best linearity with a correlation coefficient of 0.9976 was obtained for the Avrami-Erofe'evequation, n=2, by isothermal TG. The activation energy was found to be 130 kJ mol–1 and logA=11.4. The initial stage of thermolysis of TAGN also obeyed the Avrami-Erofe'ev equation, n=2, with a correlation coefficient of 0.9975by isothermal TG and the kinetic parameters are E=160.0 kJ mol–1 and logA=16.0. High temperature IR spectra showed exquisite preferential loss in intensity of the NH2, NH, N–N stretching and CNN bending. Spectroscopic and other results favour deamination reaction involving the rupture of the N–N bond as the primary step in the thermal decomposition.

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Authors and Affiliations

  1. High Energy Materials Research Laboratory, Sutarwadi, Pune, India

    S. R. Naidu, N. M. Bhide & E. M. Kurian

  2. Armament Research and Development Establishment, Pune, 411021, India

    K. V. Prabhakaran

Authors
  1. S. R. Naidu
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  2. K. V. Prabhakaran
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  3. N. M. Bhide
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  4. E. M. Kurian
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Naidu, S.R., Prabhakaran, K.V., Bhide, N.M. et al. Thermal and Spectroscopic Studies on the Decomposition of Some Aminoguanidine Nitrates. Journal of Thermal Analysis and Calorimetry 61, 861–871 (2000). https://doi.org/10.1023/A:1010113707251

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